A severe deficiency of iodine causes a lack of essential thyroid hormone production and the thyroid gland enlarges. The enlarged thyroid gland is called goiter. The swelling occurs in the throat area and can be as large as an orange. Goiter is mainly a disease of lambs and kids, it rarely occurs in calves. Goats have a higher requirement for iodine than other livestock.
Causes of Iodine Deficiency
It mostly occurs due to insufficient intake of iodine from the pasture.
Iodine deficiency may also be caused by goitrogens – substances within the feed which inhibit the utilization of dietary iodine. Goitrogens have been detected in some legumes and forage crops, but are considered unlikely to be a significant cause of goiter.
As the weather in Ohio continues to not only challenge our agricultural operations but also the activities of our daily life, it reminds us that we must be prepared for anything that may come next. Additionally, with the continued increases in fuel and feed, considering options to help extend your grazing season may be the difference between making a profit, breaking even, or losing some cash this year. In this webinar, Mr. David Hartman from Penn State University discusses ways to improve the overall efficiency and utilization of forage systems for sheep and goats. Enjoy.
Dr. Laura Lindsey, Associate Professor, Soybean and Small Grains Specialist
Lee Beers, OSU Extension Educator ANR, Trumbull County
Ed Lentz, OSU Extension Educator ANR, Handcock County
Before removing straw from the field, it’s important farmers understand the nutrient value. This is especially important now with high N, P, and K fertilizer prices. The nutrient value of wheat straw is influenced by several factors including weather, variety, and cultural practices. Thus, the most accurate values require sending a sample of the straw to an analytical laboratory. However, “book values” can be used to estimate the nutrient values of wheat straw. In previous newsletters, we reported that typically a ton of wheat straw would provide approximately 11 pounds of N, 3 pounds of P2O5, and 20 pounds of K2O. According to June 2022 fertilizer prices and nutrient removal “book values”, one ton of wheat straw would remove N, P, K valuing approximately $30.31. Continue reading →
Water sources that are often assumed to be safe, such as spring fed reservoirs and clear appearing water, can still be high in salts/sulfates. The visual appearance of water should not be used to determine if the water is good or bad. The only way to know if water is suitable for livestock is through testing.
Poor-quality water will cause an animal to drink less. As a result, they also consume less forage and feed, which leads to weight loss, decreased milk production, and lower fertility.
Dr. Mark Sulc, OSU Extension Forage Specialist, The Ohio State University
Jason Hartschuh, OSU Extension ANR Educator, Crawford County
Allen Gahler, OSU Extension Educator ANR, Sandusky County
(Previously published in the C.O.R.N. Newsletter 2022-14)
First cutting should be taken very soon to achieve high quality forage, as seen by some of the estimated NDF levels in standing alfalfa crops around the state. Keep in mind that for quality hay, alfalfa should be stored near 40% NDF and grass hay crops should have less than 55% NDF, which happens in the boot stage, or before the first flowering heads begin to emerge. Keep in mind also that the cutting, drying, and storing process results in raising NDF levels at least 3 NDF units above what it was in the standing crop at the time of cutting, and that assumes quick drying and ideal harvesting procedures.
So, it is time to be thinking about that first cutting and looking for weather windows of opportunity, especially along I-70 and south. Cutting forage for haylage or dry hay is certainly a gamble but waiting for the perfect stretch of weather can end up costing us through large reductions in forage quality as the crop matures and the fiber becomes less digestible.
Before cutting though, keep in mind that the soil should be firm enough to support equipment. Compaction damage has long-lasting effects on forage crops. We’ve seen many fields where stand loss in wheel tracks led to lower forage yields, weed invasion, and frustrating attempts to “fill in” the stand later.
First cutting is just around the corner, and this initial harvest is an opportunity to target high forage quality and yield. However, making the wrong move may create consequences that can affect stands for the rest of the season.
Joe Lawrence, dairy forage systems specialist with Cornell University, says greater inclusion rates of high-quality forage in livestock diets can lower feed costs. He encourages farmers to prioritize first cutting over other operations and aim to cut forage at its peak fiber digestibility.
“Success culminates with putting planning into action when the crop tells you it is time to harvest,” Lawrence states. “It is critical to be prepared to harvest at the optimum timing, even when that means parking the corn planter or putting other tasks on the back burner for a few days.”
Haley Zynda, OSU Extension Educator ANR, Wayne County
Pastures are really greening up in this area of Ohio and producers are antsy to turn livestock out to enjoy the lush greenery. Winter annual weeds are still thriving, patiently waiting for their summer counterparts to start germinating. Perhaps you also frost-seeded clover into pastures to improve feed quality and to cut down on nitrogen applications. If that’s the case, weed control this year will be a different story.
Having a mixed stand, whether for hay or pasture, has several benefits. As mentioned earlier, including legumes like white or red clover or alfalfa, can reduce nitrogen needs for the field. If the field is comprised of at least 25% legume, then the nitrogen fixing capability of the legume should be able to handle the nitrogen needs of the rest of the stand. In a world where nitrogen costs $1/lb, legumes are coming to the rescue.
Although commodity prices and input costs have increased significantly since the development of this presentation, the core principles supporting profitable ruminant livestock production remain the same.
Measuring moisture content of forage cut for hay or silage is an essential step to ensure storage stability and product quality. Hay baled with too much moisture can mold or be subject to spontaneous heating. Silage baled or chopped at moisture contents outside a recommended range may not ferment properly, reducing storage life and animal acceptance. A relatively new method of measuring forage moisture content is through use of an air fryer. this household appliance is basically a small convection oven. it can be used at the farm shop or can be operated in the field from a generator to provide accurate forage moisture readings.
Because of their versatility, forages play an important role in modern small ruminant production systems as they can be grazed or harvested and stored as fermented or dry feeds for later use. Forages are unique as they contain structural carbohydrates, in the form of cellulose, that can only be digested by rumen bacteria. When compared with grain-based diets, one disadvantage that is associated with forage-based diets is the number of bacteria that are used to digest forages is much lesser than those used to digest grains (3 billion bacteria/mL of rumen fluid in forage-based diets vs. 8 billion bacteria/mL of rumen fluid in grain-based diets). Rumen bacteria provide ruminants with a large proportion of daily crude protein intake, therefore, diets that are greater in forages may result in less protein available on a per pound basis when compared with grain-based diets and thus require additional supplementation. However, this slight inefficiency should not be “the end all be all” as marginal lands not suitable row cropping or commercial development as well as environmental challenges negatively impacting row cropping systems may greatly benefit from the incorporation of forage production.
From an animal perspective, increased levels of forages in the diet result in Continue reading →
Producers must pay attention to soil fertility, drying time, and storage to maximize both quality and quantity.
With May quickly approaching, hay season will soon be officially underway.
In the years since I began working at Ohio State Extension in Noble County, there have been two years when conditions were right for making dry hay in May — 2020 and 2021. The smell of mowed hay drying in the warm sun and the sight of fresh round bales soon to be peppering fields gives me a boost of much-needed optimism. For people concerned with the quality of hay, this is exciting stuff.
Making hay in May is worthy of celebration because the most influential factor on forage quality is plant maturity. As grasses and legumes emerge from the soil in springtime, energy is allocated to Continue reading →